# frozen_string_literal: true

require "string_doc"

require "pakyow/presenter/presenters/endpoint"
require "pakyow/presenter/presenters/form"

module Pakyow
  module Presenter
    # @api private
    FORM_TAG = "form".freeze
    # @api private
    OPTION_TAG = "option".freeze
    # @api private
    OPTGROUP_TAG = "optgroup".freeze
    # @api private
    INPUT_TAG = "input".freeze
    # @api private
    LABEL_TAG = "label".freeze
    # @api private
    TITLE_TAG = "title".freeze
    # @api private
    BODY_TAG = "body".freeze
    # @api private
    HEAD_TAG = "head".freeze
    # @api private
    META_TAG = "meta".freeze
    # @api private
    HTML_TAG = "html".freeze
    # @api private
    SCRIPT_TAG = "script".freeze
    # @api private
    SELECT_TAG = "select".freeze
    # @api private
    TEXTAREA_TAG = "textarea".freeze

    # @api private
    class SignificantNode
      def self.within_binding?(node)
        if BindingNode.significant?(node)
          true
        elsif !node.is_a?(Oga::XML::Document)
          within_binding?(node.parent)
        else
          false
        end
      end

      def self.binding_within?(node)
        node.children.any? { |child|
          BindingNode.significant?(child) || binding_within?(child)
        }
      end

      def self.within_form?(node)
        if FormNode.significant?(node)
          true
        elsif !node.is_a?(Oga::XML::Document)
          within_form?(node.parent)
        else
          false
        end
      end
    end

    # @api private
    class PrototypeNode < SignificantNode
      StringDoc.significant :prototype, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.attribute(:prototype)
      end
    end

    # @api private
    class EndpointNode < SignificantNode
      StringDoc.significant :endpoint, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.attribute(:endpoint)
      end

      def self.decorate(node)
        node.set_label(:presenter_type, Presenters::Endpoint)
      end
    end

    # @api private
    class EndpointActionNode < SignificantNode
      StringDoc.significant :endpoint_action, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.attribute(:"endpoint-action")
      end
    end

    # @api private
    class ContainerNode < SignificantNode
      StringDoc.significant :container, self

      CONTAINER_REGEX = /@container\s*([a-zA-Z0-9\-_]*)/.freeze

      def self.significant?(node)
        node.is_a?(Oga::XML::Comment) && node.text.strip.match(CONTAINER_REGEX)
      end
    end

    # @api private
    class PartialNode < SignificantNode
      StringDoc.significant :partial, self

      PARTIAL_REGEX = /@include\s*([a-zA-Z0-9\-_]*)/.freeze

      def self.significant?(node)
        node.is_a?(Oga::XML::Comment) && node.to_xml.strip.match(PARTIAL_REGEX)
      end
    end

    # @api private
    class BindingNode < SignificantNode
      StringDoc.significant :binding, self, descend: false

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.attribute(:binding) && node.name != FORM_TAG
      end
    end

    # @api private
    class WithinBindingNode < SignificantNode
      StringDoc.significant :within_binding, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && within_binding?(node)
      end
    end

    # @api private
    class BindingWithinNode < SignificantNode
      StringDoc.significant :binding_within, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && binding_within?(node)
      end
    end

    # @api private
    class MultipartBinding < SignificantNode
      StringDoc.significant :multipart_binding, self

      def self.significant?(node)
        BindingNode.significant?(node) &&
          node.attribute(:binding).value.include?(".") &&
          !node.attribute(:binding).value.start_with?("@")
      end
    end

    # @api private
    class ComponentNode < SignificantNode
      StringDoc.significant :component, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.attribute(:ui)
      end

      def self.decorate(node)
        node.set_label(:components, node.attributes[:"data-ui"].split(";").map { |component_string|
          Component.parse(component_string)
        })
      end
    end

    # @api private
    class ModeNode < SignificantNode
      StringDoc.significant :mode, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.attribute(:mode)
      end
    end

    # @api private
    class FormNode < SignificantNode
      StringDoc.significant :form, self, descend: false

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.attribute(:binding) && node.name == FORM_TAG
      end

      def self.decorate(node)
        node.set_label(:presenter_type, Presenters::Form)
        node.set_label(:view_type, Form)
      end
    end

    # @api private
    class WithinFormNode < SignificantNode
      StringDoc.significant :within_form, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && within_form?(node)
      end
    end

    # @api private
    class OptionNode < SignificantNode
      StringDoc.significant :option, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.name == OPTION_TAG
      end
    end

    # @api private
    class OptgroupNode < SignificantNode
      StringDoc.significant :optgroup, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.name == OPTGROUP_TAG
      end
    end

    # @api private
    class MethodOverrideNode < SignificantNode
      StringDoc.significant :method_override, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.name == INPUT_TAG && node.attribute(:name).to_s == "_method"
      end
    end

    # @api private
    class LabelNode < SignificantNode
      StringDoc.significant :label, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.name == LABEL_TAG
      end
    end

    # @api private
    class TitleNode < SignificantNode
      StringDoc.significant :title, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.name == TITLE_TAG
      end
    end

    # @api private
    class BodyNode < SignificantNode
      StringDoc.significant :body, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.name == BODY_TAG
      end
    end

    # @api private
    class HeadNode < SignificantNode
      StringDoc.significant :head, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.name == HEAD_TAG
      end
    end

    # @api private
    class MetaNode < SignificantNode
      StringDoc.significant :meta, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.name == META_TAG
      end
    end

    # @api private
    class HTMLNode < SignificantNode
      StringDoc.significant :html, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.name == HTML_TAG
      end
    end

    # @api private
    class TemplateNode < SignificantNode
      StringDoc.significant :template, self

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && node.name == SCRIPT_TAG && node[:type] == "text/template"
      end
    end

    # @api private
    class FieldNode < SignificantNode
      StringDoc.significant :field, self

      FIELD_TAGS = [
        INPUT_TAG,
        SELECT_TAG,
        TEXTAREA_TAG
      ].freeze

      def self.significant?(node)
        node.is_a?(Oga::XML::Element) && FIELD_TAGS.include?(node.name)
      end
    end
  end
end